JPS6315151Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a side plate joining structure of an assembly box consisting of a bottom plate and four side plates around the periphery.

[Prior art and its problems] Boxes made of wood or synthetic resin materials that are assembled from the beginning in a manufacturing factory by joining the bottom plate, side plates, and side plates together using nailing screws or adhesive means, In addition to being time-consuming, it is quite bulky and inconvenient to transport to the site of use or otherwise handle when not in use, so in recent years it has been proposed to assemble it into a box at the site of use. One example is a box made of a synthetic resin material in which side plates are connected to the four circumferences of the bottom plate via hinges so that they can stand up freely (for example, Japanese Utility Model Publication No. 16295/1983);
There are some models in which the bottom plate and side plates are formed separately and then joined together (for example, Japanese Patent Publication No. 39-7091), but when assembling the side plates, nailing, screwing, or adhesive methods are not used to connect the side plates to each other. There are many types of connectors that are used, and those that use other connectors have rather complicated structures, and the assembly work is labor-intensive. Furthermore, it is not easy to disassemble the box into its unfolded state.

Therefore, in order to simplify the assembly work of a prefabricated box consisting of a bottom plate and side plates, the inventors of the present invention have constructed a structure in which the side plates are connected to each other via hinges on each side edge of the bottom plate so that they can be bent and erected. The connecting structure was devised with the aim of creating a connection structure that can be easily connected by a very simple fitting operation at each corner, and that can also be easily disassembled into the unfolded state.

[Means for solving the problems] The assembly box of the present invention that solves the above problems has the following features:
It has a bottom plate and a side plate connected to each side edge of the bottom plate via a hinge part so as to be able to bend and stand up. A plate-shaped engagement piece having a locking portion having a substantially hook-shaped cross section on one side of the distal end protrudes from one of the abutting end surfaces, and the other abutting end has a plate-like engagement piece that has a locking portion having a substantially hook-shaped cross section on one side of the distal end. An engagement hole is provided into which the locking part of the engagement piece can fit and be elastically locked, and is configured to be butt-coupled in the upright state, and furthermore, in the locked state, the tip of the engagement piece is connected to the other side. It is provided so as to slightly protrude from the outer surface of the peripheral portion of the engagement hole of the abutting end, and is configured to be elastically pressable in the direction of releasing the locking action of the locking portion. That is.

[Function] When assembling the above-described assembly box of the present invention, the side plates connected to each side edge of the bottom plate are bent and erected from the hinge portions that are connected to the bottom plate, and One of the adjacent side plates is butted against the other end, and the engaging piece on one butting end is inserted and locked into the engaging hole on the other mating end. First, the side plate having the engagement piece is erected, and while the other side plate having the engagement hole is erected, the engagement hole is aligned with the engagement piece. It is only necessary to insert the side plates into the engagement holes and lock the locking portions, and thereby the upright side plates can be connected to each other in a butt state at the corners, and in turn, the bottom plate and the adjacent This means that the three side plates can be combined into an assembled state.

In the above-mentioned combined and assembled state, the both side plates are connected to each other by the engaging pieces and the engaging holes, and the outward tilting and expanding action and the inward tilting action are prevented.

Furthermore, when the side plates are connected to each other by the engagement piece and the engagement hole, the tip of the engagement piece slightly protrudes from the outer surface of the periphery of the engagement hole at the other abutting end. By pressing the protruding tip of the piece in the opposite direction to the side where the locking part exists and slightly displacing it elastically, the locking action of the locking part can be released without difficulty, and the locking hole is engaged. By pulling out the pieces, each side plate can be expanded.

[Example] Next, an example of the present invention will be described based on the drawings.
In the embodiment shown in FIGS. 1 to 10, A indicates an assembly box according to the present invention, 1 is a bottom plate having a rectangular plane, and 2a, 2a and 2b, 2b are folded on the four side edges of the bottom plate 1, respectively. Each of the side plates of opposite side parts connected to each other in a curved and upright manner, particularly in the case of this first embodiment, has a bottom plate coupling part 3 which can be attached to a corner part of the bottom plate 1, and a bottom plate connecting part 3 which can be attached to a corner part of the bottom plate 1; Adjacent side plate 2a,
A corner connecting member B consisting of two side plate connecting parts 4a, 4b to which the ends of the bottom plate 1 and each side plate 2b can be attached is used for each corner.
b and 2b are arranged in series, and are configured as follows.

The connecting member B is integrally formed mainly from a synthetic resin material such as polyethylene resin, polypropylene resin, polyvinyl chloride resin, etc. Upper and lower parallel plate parts 6 and 7 are connected to the upper and lower edges of the substantially L-shaped end plate part 3 that forms a right angle, with an interval that is approximately the same as the thickness of the bottom plate 1. It is fitted and attached to the corner of the bottom plate 1 from the opening side, and the upper and lower plate parts 6, 7 and the bottom plate 1 fitted thereto are further connected by fastening means 8 such as screws or rivets. Fixed. When the bottom plate 1 is fitted to the bottom plate joint 3 in such a way that it cannot easily come off, or when the box is used simply by fitting, it is sufficient to withstand use.
Although the above-mentioned fixing is not necessarily necessary, it is preferable in practice to use some kind of locking means such as fastening as mentioned above.

Further, the side plate coupling parts 4a and 4b are connected to both sides of the bottom plate coupling part 3, that is, both sides of the substantially L-shaped end plate part 5, and have substantially U-shaped ends of the upper, side, and lower sides, respectively. The inner and outer plate parts 10a, 11a, 10b, 11b connect to the side plates 2a, 2 via the plate parts 9a, 9b.
The end portions of the side plates 2a and 2b are fitted and attached in parallel to both side portions 7a and 7b of the end plate portion 7. In particular, the both side plate joints 4a and 4b are
The lower side edges of the outer plate parts 11a and 11b, which are the lower surfaces when unfolded relative to the bottom plate joint part 3, are approximately L.
The connecting plates 12a and 12b are connected to the lower edges of both sides of the end plate part 5 of the shape at a required interval approximately corresponding to the end plate part 5 through connecting plates 12a and 12b of a required width. Hinge parts 13a and 13b are formed by V-shaped or U-shaped grooves or other thin parts at the bases of the bottom plate joint parts 3 of the hinge parts 12a and 12b.
By bending at 3a and 13b, the connecting plates 12a and 12b are attached to the end plate part 5 of the bottom plate joint part 3, and the side plate joint parts 4a and 4b stand up on the side edges of the bottom plate joint part 3. It is set up so that it can be done. Therefore, the connecting plates 12a and 12b are approximately L.
It is set to have approximately the same width as the end plate portion 5 of the shape. In this case, the side plate coupling parts 4a, 4b and the bottom plate coupling part 3 can support the stacking load caused by stacking or the like.

Furthermore, one side plate joint part 4a has a thickness corresponding to the thickness of the side plate joint part 4b on the corner side so that it can butt against the inside of the corner part side end part 14 of the other side plate joint part 4b in the upright state. It is coupled without . Therefore, the side plates 2a, 2b which are adjacent to each other at each corner can be brought into contact with one side 2a against the inner side of the end of the other 2b via the side plate coupling parts 4a, 4b of the connecting member B.

At approximately the center of the abutting end surface 17 of the one side plate joint 4a, there is a plate having a locking portion 18 having a substantially hook-shaped cross section on one side of the tip and having some moderate elasticity in terms of material. A shaped engagement piece 15 is provided in a protruding manner, and a locking part 18 of the engagement piece 15 is fitted into the abutting end 14 of the other side plate coupling part 4b when the side plates 2a, 2b are in an upright state. An engaging hole 16 that can be locked is provided on one side, and by fitting and locking the engaging piece 15 into the engaging hole 16, both side plate joint parts 4a, 4b, that is, both side plates 2a,
2b can be joined in a butt state. Reference numeral 19 indicates a notched stepped portion to which the locking portion 18 locks.

In particular, the above-mentioned engagement piece 15 has a height such that its tip is slightly protruded from the outer surface of the peripheral part of the engagement hole 16 at the abutting end 14 of the other side plate coupling part 4b in the above-mentioned engaged state. The protruding tip of the engaging piece 15 is connected to the locking part 1.
8, that is, in a direction in which the locking action on the cutout step portion 22 is released, it can be elastically pressed and flexibly displaced against the elastic force. In order to facilitate this detachment operation by pressing and bending, the engaging piece 15 is formed with a slight slanted notch on the side opposite to the tip locking part 18. In particular, if the locking portion 18 is projected inward of the box as shown in the figure, the engagement can be released by pressing the engagement piece 15 outward as shown by the chain line in FIG. , its operation is easy. Further, the engagement piece 15 is connected to the abutting end 14.
If the height does not protrude outside the 10th
As shown in the figure, if the outer surface of the peripheral part of the engagement hole 16 is slightly removed, the tip of the engagement piece 15 will be slightly protruded from the outer surface, and the protruding tip of the engagement piece 15 will be similar to the above. The engagement can be released by pressing operation.

Furthermore, in the case of this embodiment, a convex portion 20 is provided on the abutting end surface 17 of one side plate coupling portion 4a, and a convex portion 20 is fitted on the abutting end surface 14 of the other side plate coupling portion 4b in the abutting state. A concave portion 21 is provided, and the fitting of the convex portion 20 and the concave portion 21 positions the side plate coupling portions 4a, 4b against each other. In the above-mentioned fitted state, the locking portion 18 protrudes from the engagement hole 16 so that the locking portion 18 of the engagement piece 15 remains locked in the notch step portion 19 of the engagement hole 16. It is formed to be in a state. In this case, even if the engagement hole 16 has a width that allows the locking part 18 of the engagement piece 15 to pass through, the locking part 18 will not be able to pass through when the convex part 20 and the recess 21 are fitted. In order to solve this problem, in the illustrated embodiment, the engaging piece 15 is made to protrude independently from the convex part 20 on the side opposite to the protruding side of the locking part 18 with a slight gap therebetween. At the same time, an inclined surface 23 is formed on the side of the distal end locking portion 18 of the engaging piece 15, and the convex portion 20 and the recessed portion 21 are fitted together, and the inclined surface 23 is aligned with the edge of the engaging hole 16. It is made to be in a sliding state so that it can be inserted elastically, and the bending displacement action by pressing the protruding tip of the engaging piece 15 described above can be elastically performed. The engaging piece 15 can be provided at the location of the convex portion 20, but if the protruding height is small, the engaging piece 1
Since the elasticity of the engagement piece 5 is almost lost, it is desirable for the engagement and disengagement operations that the engagement piece 15 be formed separately from the convex portion 20 to have a certain degree of elasticity as described above. Of course, the above-mentioned convex portion 20 and concave portion 21
It is also possible to provide the reverse.

When the convex part 20 and the concave part 21 are fitted together in the connection between the side plate joint parts 4a and 4b as described above, the convex part 20 is connected to the concave part 21 on the lower end side as shown in the figure.
The lower end of the convex portion 20 is further rounded if necessary so that the fitting action accompanying the bending and raising action using the hinge portion 13b as a fulcrum can be performed without any inconvenience. .

In addition, regarding the above-mentioned connecting member A, the side plate connecting part on the left side when viewed from the opening side of the bottom plate connecting part 3 is used as the side plate connecting part 4a having the engagement piece 15 on the end surface, and the side plate connecting part 4b is butt-connected to the other side plate connecting part 4b. However, as for the connecting member A at the adjacent corner, contrary to the above, as shown in an enlarged view in FIG. Side plate joint part 4 having an engagement piece 15 on the end face of the joint part
The other side plate coupling portion 4 having an engagement hole 16 as a
It is configured so that it can be butt-coupled to b.

As an assembly box, the side plate joint 4 is usually
The first one in which the butting direction of a and 4b is reversed left and right.
4 pieces of each of the connecting members B shown in the figure and 4, 2 pieces each,
The side plate joints 4a and 4b having the same abutting direction are arranged at diagonally located corners, that is, the connecting members B and B at the adjacent corners are side plate joints having the engaging pieces 15. 4a and 4b or side plate coupling parts 4a and 4b having engagement holes 16 are arranged so as to face each other, and the bottom plate coupling part 3 of each connecting member B is fitted to the corner part of the bottom plate 1. At the same time, the end portions of the side plates 2a and 2b are fitted and attached to the side plate coupling portions 4a and 4b, respectively, as shown in the figure, thereby constructing a prefabricated box A. During handling when not in use, such as during transportation, both side plates 2a and 2b are kept unfolded relative to the bottom plate 1.

In assembling the box A at the site where it is used, first, the opposite side plates 2a, 2a attached to the side plate coupling part 4a on the side having the engagement piece 15 are attached to the side plate coupling part 4a.
It is bent from the hinge part 12a along with a, and is made to stand up while resting on the side edge of the bottom plate joint part 3 (FIG. 5). Next, the opposing side plates 2 attached to the side plate coupling portion 4b on the side having the other engagement hole 16
b, 2b is bent and raised from the hinge part 13b together with the side plate joint 4b, and at the same time, the side plate is inserted into the engagement hole 16 formed in the abutting end 14 with the side plate joint 4a raised earlier. By fitting the engagement piece 15 provided on the abutting end surface 17 of the coupling portion 4a and causing the locking portion 18 to engage the engagement step portion 19, the upright side plate coupling portions 4a and ab are brought into abutting state. Then, the other side plate 2b is made to stand up together with the side plate coupling part 4b in the same manner as described above, and the engagement piece 15 of the side plate coupling part 4a is fitted into the engagement hole 16 of the side plate coupling part 4b to lock the locking part 18. is used to connect the two by locking them, and especially at this time, the sixth
If the box is raised up as shown in the figure, the connecting members B and B at the two adjacent corners can be simultaneously engaged and butt-coupled, thereby allowing the bottom plate 1 and each of the four side plates 2a, A predetermined box A in which boxes 2a, 2b, and 2b are connected and connected at each corner by a connecting member B is assembled as shown in FIG.

Note that, since the tip of the engagement piece 15 slightly protrudes outward from the other abutting end 14, when performing the engagement operation to raise the box as described above, Since complete engagement cannot be achieved due to the protrusion of the engagement piece 15, the engagement of the engagement piece 15 such as the vertical position of the outer surface of the peripheral part of the engagement hole 16 in the upright state as shown in the figure, It is desirable to provide the protrusion 24 at a position where it does not interfere with the detachment operation so that the above operation can be performed.

Also, to disassemble the box A above into an expanded state,
As shown by the chain line in FIG.
The locking part 1 is pressed in the direction opposite to the side with the
By releasing the locking action by 8, the side plate coupling portion 4b side can be pulled out from the engagement piece 15, and each side plate 2a, 2b can be tilted and expanded outward.

The means for connecting the engaging piece 15 and the engaging hole 16 at the abutting end surface 17 on the side plate 2a side and the abutting end portion 14 on the side plate 2b side is the fitting between the convex part 20 and the concave part 21 as described above. Although it is preferable to use joints together in order to maintain the strength of the bonded state, the present invention is not limited to this, and it is also possible to omit the protrusions 20 and recesses 21 and simply provide the engagement pieces 15 and engagement holes 16 that engage with each other. In this case as well, the tip of the locking piece 15 is configured to slightly protrude from the outer surface of the periphery of the other engagement hole in the butt-connected state, as described above.

In addition, in the above-described embodiment, the bottom plate coupling portion 3, which is a part of the bottom plate 1, has a shape in which the opening edge is curved and slightly recessed as shown in the figure, and also has a fan-shaped planar shape, a substantially triangular planar shape, a quadrangular shape, etc. The shape of the opening edge can be changed in various ways, and the side plate joint portion 4a,
4b as well, the upper sides of the substantially U-shaped end plates 9a, 9b are shortened, and the opening edges of the inner and outer plates 10a, 11a, 10b, 11b are slightly curved and recessed, similar to the bottom plate joint 3. In addition to shaping,
The shape can be changed in various ways. In particular, when using fixing means such as screws, rivets, or adhesives for the bottom plate joint 3 and side plate joints 4a and 4b, the top plate of the bottom plate joint 3 is fixed as shown in FIG. It is possible to implement various structures, such as omitting one of the inner and outer plate parts of 5 and the side plate joint parts 4a and 4b, or making the peripheral edge part only slightly wider. 8' indicates a fastening hole. Also, the opening edge of the upper plate part 6 of the bottom plate joint part 3 and the inner and outer plate parts 10a, 11a, 10 of the side plate joint parts 4a, 4b.
It is preferable that the opening edges of b and 11b be chamfered as shown. Reference numeral 25 denotes a positioning protrusion that fits into the lower box when the boxes are stacked.

It is also possible to construct and implement a box assembly as shown in FIG. 13 by using connecting members B in which the side plate joints 4a and 4b are aligned in the same direction at each corner.

In the case of the above embodiment, each connecting member B at the corner supports the stacking load during stacking, so the bottom plate 1 and side plates 2a, 2a, 2b, 2b are made of wood, synthetic resin, etc. In addition, plates made of various materials such as synthetic resin foam and cardboard can also be used.

In addition to the above-mentioned structure, the connection structure between the side plate joints 4a, 4b and the bottom plate joint 3 is as shown in FIG. Side plate joint 4
By forming hinge parts 13a and 13b at the bases on the sides a and 4b, the side plate joint parts 4a and 4b are attached to the outside of the bottom plate joint part 3 and the connecting plates 12a and 12
It may also be provided so as to stand up on top of b.
In addition, as shown in FIG. 15, connecting plates 12a and 12b
It is also possible to omit the hinge parts 13a and 13b and connect them only by the hinge parts 13a and 13b so as to stand up on the side edges of the bottom plate joint part 3. In either of these cases, the side plate joint parts 4a and 4b are engaged with each other. It can be constructed and implemented so that it can be engaged and disengaged by an engagement structure similar to that described above using the piece and the engagement hole.

In each of the above embodiments, the bottom plate 1 and the side plates 2a, 2a, 2b, 2b, which are formed separately, are connected to each other using a corner connecting member B at each corner. As shown in Figs. 16 and 17, the idea is to make a bottom plate 1 made of a material such as synthetic resin.
The four circumferential side plates 2a, 2a, 2b, 2b are integrally formed, and the connection structure using the above-mentioned connecting member is integrally added to these, that is, the side plates 2a, 2b adjacent to each other at each corner are connected to one side. The side plates 2a, 2 are formed so that they can be butted against the inside of the other end, and engagement means using the coupling piece 15 and the engagement hole 16 similar to those described above are provided at the abutting ends.
It can be formed so that it can be butt-joined by the erecting action of b.

That is, the abutting end surface 17 of one opposing side plate 2a is provided with an engaging piece 15 protruding from the abutting end surface 17 having a locking portion 18 at its tip, as in the case of the above-mentioned connecting member, and the abutting end surface 17 of the other side plate 2b Part 14
has an engaging hole 1 into which the engaging piece 15 can fit and lock.
6, and the tip of the engaging piece 15 is slightly protruded from the outer surface of the peripheral portion of the engaging hole 16. Other structures such as fitting means between 20 and recess 21 can be configured and implemented in the same manner as in the case of the above-mentioned connecting member. Also in this case, it is preferable to configure the direction in which the side plates 2a and 2b abut against each other and the direction in which the engaging piece 15 of the coupling means protrudes to form a mutually symmetrical shape at adjacent corner portions. The box can be assembled and configured by engaging operations similar to those described above.

Also in this embodiment, each side plate 2a, 2
a, 2b, 2b are connected to the bottom plate 1 via connecting plates 12a, 12b so as to stand upright on the side edges of the bottom plate 1, and the connecting plates 12a, 12b
In addition to providing the hinge parts 13a and 13b at the base of the base plate, the side plate may be formed so as to be bent and stand on the connecting plate, or the connecting plate may be omitted and the side plate may be attached to the bottom plate only at the hinge part. You can also connect with. In addition to the case where the above-mentioned connecting part extends over the entire length of the side edge of the bottom plate, the connecting part may be formed partially at both ends or the center part.

Furthermore, as a modification of the above embodiment, although not shown, a separately formed bottom plate 1 and side plates 2a, 2
a, 2b, 2b are bendably connected by another hinge member 25, and the side plates 2a, 2b adjacent to each other at each corner are connected to the engaging piece 15 and the engaging hole 16 in the same manner as above. The box can be constructed so as to be able to be butt-joined by means of engagement means, and in this case as well, the assembly and unfolding operations of the box by joining the side plates can be performed in the same manner as described above.

[Effects of the invention] As described above, according to the assembly box of the invention, each side plate can be unfolded against the bottom plate in a flat and low-bulk state when being handled during transportation or other non-use, which improves transportation efficiency and storage efficiency. It is possible to greatly increase the cost of shipping empty boxes, and to significantly reduce the transportation costs required for returning empty boxes.

When assembling the box, all you have to do is bend the side plates up against the bottom plate, fit the engagement piece into the engagement hole, and lock the two adjacent side plates against each other at the corner. Therefore, the bottom plate and each side plate can be reliably connected with only a very simple fitting operation without the need for nailing, screwing, or gluing, and a predetermined box can be assembled and configured as follows. It is possible to simplify the assembly work of a vertically assembled box.

Moreover, when disassembling to the deployed state, press the protruding tip of the engagement piece that slightly protrudes from the outer surface of the peripheral area of the engagement hole at the butting end in the opposite direction to the side where the locking part exists. By slightly elastically displacing the locking part, the locking action of the locking part can be released without difficulty, so the locking hole can be easily pulled out from the locking piece, and each side plate can be expanded very easily. be able to.

Further, according to the assembled box of the present invention, due to the mutual connection of the side plates, the stability of each side plate of the assembled box and, by extension, the shape retention of the entire box are excellent. In particular, when the structure is such that each side plate rests on the bottom plate, the stacking load during stacking can be supported by the bottom plate, and the burden on the hinge part, which is the connecting part, can be reduced.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, and Fig. 1 is a perspective view before assembly, Fig. 2 is an enlarged perspective view of the corner connecting member portion, and Fig. 3 is a perspective view from the bottom side of the same. Figure 4 is an enlarged perspective view of other connecting member parts, Figure 5 is a perspective view showing the state of the box assembly operation,
Fig. 6 is a side view of the same, Fig. 7 is an enlarged perspective view of a part of the same, Fig. 8 is a sectional view of the same as above, Fig. 9 is a cross-sectional view of the same as above.
The figures are a cross-sectional view of the same combined state as above, FIG. 10 is an enlarged perspective view of a part with different protruding states of the engagement piece, and
The figure is a perspective view of the assembled state, FIG. 12 is a perspective view illustrating another connecting member, FIG. 13 is a perspective view showing another box assembled, and FIGS. 14 and 15 are each showing the connecting member. FIGS. 16 and 17 are a cross-sectional view showing another different embodiment, and a perspective view and a partially enlarged perspective view showing still another embodiment. A...Box, B...Connection member, 1...Bottom plate, 2
a, 2b...Side plate, 3...Bottom plate joint, 4a, 4
b...Side plate joint portion, 12a, 12b...Connection plate,
13a, 13b...hinge portion, 14...butt end portion, 15...engaging piece, 16...engaging hole, 17...
...Abutting end surface, 18...Locking portion.

Claims (1)

[Claims for Utility Model Registration] 1. It has a bottom plate, and side plates connected to each side edge of the bottom plate via hinges so as to be bendable and erectable, and the side plates that are adjacent to each other at each corner are , one end is formed so as to be able to butt against the other end, and a plate-shaped engagement piece having a locking portion having a substantially hook-shaped cross section on one side of the distal end protrudes from the one butt end surface, The other butted end is provided with an engagement hole into which the locking portion of the engagement piece can be fitted and elastically locked, and configured to be butted and coupled in the upright state, and further in the locked state. The tip of the engagement piece is provided so as to slightly protrude from the outer surface of the periphery of the engagement hole of the other abutting end, and is elastically pressed in the direction of releasing the locking action of the locking part. A side plate joining structure of an assembly box, characterized in that the side plate joining structure is configured such that the assembly box can be assembled. 2. The side plate joining structure for an assembly box according to claim 1, wherein the bottom plate and each side plate are integrally molded from synthetic resin or the like via a hinge part. 3. The side plate joining structure for an assembly box according to claim 1, wherein the bottom plate and each side plate are connected by a connecting member having a hinge structure. 4. The bottom plate and each side plate consist of a bottom plate joint attached to a corner of the bottom plate, and two side plate joints that are connected via hinges to both outer sides of the bottom plate joint and hold the end of the side plate. The adjacent side plates are connected by a corner connecting member consisting of a corner connecting member, and the adjacent side plates are formed so as to be able to butt each other through the side plate connecting portion, and the engaging piece engages with the both side plate connecting portion. A side plate joining structure for an assembly box according to claim 1 or 3 of the utility model registration claim, which is provided with a hole. 5 Each side plate is provided on the side edge of the bottom plate so that it can be bent and raised freely.
Any one of paragraph 2, paragraph 3, or paragraph 4
The side plate joint structure of the assembly box described in . 6 Claim No. 6 for Utility Model Registration, in which the abutting end face of one side plate and the abutting end of the other side plate are provided with fitting means of a convex portion and a concave portion that fit into each other in the abutting state. Section 1, Section 2
Any one of paragraph 3, paragraph 4, or paragraph 5.
The side plate joint structure of the assembly box described in . 7 Utility model registration claims 1, 2, 3, and 4, in which a protrusion approximately the same height as the protrusion of the tip of the engagement piece is formed on the outer surface of the peripheral portion of the engagement hole
The side plate joint structure of an assembly box according to any one of Items 5 and 6.